Grate for automatic stokers.



l. REAGAN.

GRATE FOR AUTOMATIC STOKERS.

APPUCATION FILED sEPT.19.|191-6.

Patented M1124, 1917.

UNTER@ fllldllli QFFltlE.,

JAIIES REAGAN, 01 PHILADELPHIA., PENNSYLVANIA.

GRATE FOR AUTGMATIC STOKERS.

Application filed September i9, 1916.

To all whom it may concer/n:

Be it ltnown that l, latins Rensen, a citizen of the Ul'iited States, residing in the city and county of Philadelphia, State of lennsylvania, have invented new and use ful Grate for Automatic Stolrers, of which the following is a specication.

My invention relates to an improved grate for automatic Stoker furnaces having for its principal object means for retaining a sufficient quantity of ash thereon to form an insulation between the fire and the grate to protect the metallic grate from the intense heat of the fire.

A further object of my invention is to provide a stepped inclined reciprocating grate of this character with perforations for the exhaust of air to the fire from a chamber below said grate and forming a part thereof with pockets or recesses for the reception of ash, formed in the substantially horizontal and upright faces of said stepped grate intermediate the said air discharge perforations to allow for the discharge of sir to the lire without disturbing the ash packed in the pockets out of the plane of discharge of air from said perforations.

A still further object of my invention is to provide a series of pockets in staggered or parallel relation to each other and below the plane surfaces of the substantially horizontal and upright faces of said stepped grate, whereby there is a packing of ash in said pockets due to the weight of coal of the fire and the reciprocating movement of said grate.

A still further object of my invention is to allow for the reduction of the metallic weight of said grates and at the same time lengthen the life of the metal forming said grates by preventing burning of the same due to the protection afforded from the intense heat of the fire to which such gratos are subjected.

For the purpose of illustrating my invention, l have shown in the accompanying drawing forms thereof which are at present preferred by me, since the same will be found in practice to give satisfactory7 and reliable results, althou `h it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrange- Speccation of Letters Patent.

Fatented Apr. 2d, MHK

Serial No. 120,914.

ment and organization of these instrumentalities as herein shown and described.

Figure l is a vertical, longitudinal, sectional view partly in elevation, illustrating the poc rets or recesses for the reception of ash in the substantially h riaontal and upright faces of the inclined stepped grate.

lfig. 2 is a plan view of one of the stepped plate grate members, illustrating several of the substantially horizontal and upright faces of said grate provided with said pockets or recesses.

Fig. 3 is a view partly in side elevation and a section of Fig. 2.

Fig. l is an enlarged fragmentary sectional view of said inclined step grate illustrating the pockets or recesses formed in the substantially horizontal and upright faces of said grate showing ash packed in said pockets or recesses and out of the plane of discharge of air from the perforation's in the grate for supplying air from a chamber below the grate and forming a part thereof to the fire supported on said grate.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings.

l represents in its entirety a. grate section comprising the inclined stepped grate 2 made up in sections of stepped plate members. Below the inclined grate 1 and forming apart thereof an air chamber 3 is located to supply air to the lire through the perforations 4C in the grate. rEhis chamber also contains a perforated pipe 5 connected to a steam supply to provide steam to be discharged with the air to the fire through the perforations l in the inclined grate 1. rlhe arm 1l patented Feb. 15th, 1916, #1,171,803, connected to reciprocating means, not shown in the drawing, is secured to the grate 1 Jfor reciprocating the same back and forth for purposes well known in this art.

The principal feature of my invention resides in forming pockets or recesses 6 and 7 in the substantially upright and horizontal faces 8 and 9 respectively of the inclined stepped grate 1 in such a manner :.s to substantially embrace the entire areas of said faces as illustrated in Fig. 2 of the drawings to fully cover the grate with a layer of ash for heat insulating purposes.

The pockets or recesses 6 and 7 are preftor between erably formed conical in cross section with a flat base parallel with the face of 'the step, this manner of forming the pocket has been found most advantageous for packing and holding the ash. Intermediate the recesses 6 and 7 in the faces of the grate the discharge openings 10 of the perforations are located and insure a discharge of air from the chamber 8 to the fire out of a plane of the ash in the pockets or recesses 6 and 7 thereby allowing for the admission of air to the fire without disturbing the layer of ash in the said recesses.

In operation the packing of the ash in the pockets of the substantially horizontal and upright faces of the grate is caused by the weight of the coals of the fire and the pockets or recesses in the upright faces are packed with ash by the reciprocating movement of the grate, in this manner it can readily be seen that the grate will substantially have a cover of ash to act as an insulathe fire and the grate to prevent burning out of the metal of said grate. While in the preferred form of my invention pockets or recesses are formed in the substantially horizontal and upright faces of the grate it may be desirable, under certain conditions, to have the pockets or recesses in only one of said faces or recesses or in alternating faces of said grate.

It will now be apparent thatI have devised a novel and useful grate for automatic stolers which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description, and while I have, in the present instance, shown and described preferred embodiments thereofwhichwill be found in practice to give satisfactory and reliable results, it is to be understood that the same are susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

Having thus described. my invention,

what I claim as new and desire to secure by Letters Patent, is Y Y r l. A grate for automatic stokers of the character described, having substantially horizontal and upright faces, ash retaining pockets -or recesses recesses arranged in such a manner so as to substantially embrace the entire area of said faces, perforations in said grate between alternate pockets or recesses in the horizontal and upright faces, to allow for the discharge of air from an air chamber, be-

low the grate and forming a part thereof, through the perforations in said grate to the fire.

2. A grate for automatic stokers of the character described, having substantially horizontal and upright faces, ash retaining pockets or recesses formed in said faces, said recesses arranged in such a manner so as to substantially embrace the entire area of said faces, perforations in said grate between alternate pockets or recesses in the horizontal and upright faces, the discharge openings of said perforations in the surface of said grate and intermediate said ash retaining recesses allowing for the discharge of air therefrom to the fire without disturbing the ash in the said recesses.

3. In a device of the character stated, a grate having` its surface inclined and its fuel receiving face composed of detachable stepped sections, having substantially horizontal and upright faces, a series of ash retaining pockets arranged in staggered order in said horizontal face, so as to substantially embrace the entire area of said face, said face having a series of perforations therein, whose discharge openings are located between said ash pockets, so as to permit the discharge of air to the lire without disturbing the ash in said ash pockets.

JAMES REAGAN.

Witnesses:

FRANK SWINEHART, RICHARD J. BENJAMIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

formed in said faces, said 

